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kubeconfig.go
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kubeconfig.go
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// Copyright 2020 KubeSphere Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package kube
import (
"context"
"encoding/base64"
"encoding/json"
"github.com/ghodss/yaml"
"github.com/kubesphere/kubeeye/clients/clientset/versioned"
"github.com/kubesphere/kubeeye/pkg/conf"
"github.com/kubesphere/kubeeye/pkg/constant"
"github.com/pkg/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
_ "k8s.io/client-go/plugin/pkg/client/auth"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/klog/v2"
"sigs.k8s.io/controller-runtime/pkg/client/config"
)
//var KubeConfig *rest.Config
type KubernetesClient struct {
KubeConfig *rest.Config
ClientSet kubernetes.Interface
VersionClientSet versioned.Interface
DynamicClient dynamic.Interface
}
// GetKubeConfig get the kubeconfig from path or by GetConfig
func GetKubeConfig(kubeconfigPath string) (*rest.Config, error) {
var kubeConfig *rest.Config
var err error
if kubeconfigPath != "" {
kubeConfig, err = clientcmd.BuildConfigFromFlags("", kubeconfigPath)
if err != nil {
kubeConfig, err = config.GetConfig()
if err != nil {
return nil, errors.Wrapf(err, "failed to load kubeconfig file from %v", kubeconfigPath)
}
}
} else if kubeconfigPath == "" {
kubeConfig, err = config.GetConfig()
if err != nil {
kubeConfig, err = rest.InClusterConfig()
if err != nil {
return nil, errors.Wrap(err, "failed to load kubeconfig file from $HOME/.kube/")
}
}
}
return kubeConfig, err
}
func GetKubeConfigInCluster() (*rest.Config, error) {
kubeConfig, err := rest.InClusterConfig()
if err != nil {
kubeConfig, err = config.GetConfig()
if err != nil {
return nil, err
}
}
return kubeConfig, nil
}
// K8SClients return kubeconfig clientset and dynamicClient.
func (k *KubernetesClient) K8SClients(kubeConfig *rest.Config) (*KubernetesClient, error) {
clientSet, err := kubernetes.NewForConfig(kubeConfig)
if err != nil {
return nil, errors.Wrap(err, "failed to load clientSet")
}
dynamicClient, err := dynamic.NewForConfig(kubeConfig)
if err != nil {
return nil, errors.Wrap(err, "failed to load dynamicClient")
}
versionClientSet, err := versioned.NewForConfig(kubeConfig)
if err != nil {
return nil, errors.Wrap(err, "failed to load informersClient")
}
k.VersionClientSet = versionClientSet
k.ClientSet = clientSet
k.DynamicClient = dynamicClient
k.KubeConfig = kubeConfig
return k, nil
}
func GetK8SClients(kubeconfig string) (*KubernetesClient, error) {
kubeConfig, err := GetKubeConfig(kubeconfig)
if err != nil {
return nil, errors.Wrap(err, "failed to load config file")
}
var kc KubernetesClient
clients, err := kc.K8SClients(kubeConfig)
if err != nil {
return nil, err
}
return clients, nil
}
func GetMultiClusterClient(ctx context.Context, clients *KubernetesClient, clusterName string) (*KubernetesClient, error) {
klog.Infof("starting get cluster config %s", clusterName)
raw, err := clients.ClientSet.CoreV1().RESTClient().Get().AbsPath("/apis/cluster.kubesphere.io/v1alpha1/clusters/").Name(clusterName).DoRaw(ctx)
if err != nil {
klog.Error(err, "failed to get cluster config")
return nil, err
}
var cluster map[string]interface{}
err = json.Unmarshal(raw, &cluster)
if err != nil {
klog.Error(err, "failed to unmarshal cluster config")
return nil, err
}
kubeConfig := cluster["spec"].(map[string]interface{})["connection"].(map[string]interface{})["kubeconfig"].(string)
decodeString, err := base64.StdEncoding.DecodeString(kubeConfig)
if err != nil {
klog.Error(err, "failed to decode kubeconfig")
return nil, err
}
clientCmdConfig, err := clientcmd.NewClientConfigFromBytes(decodeString)
if err != nil {
klog.Error(err, "failed to get client config")
return nil, err
}
clientConfig, err := clientCmdConfig.ClientConfig()
if err != nil {
klog.Error(err)
return nil, err
}
var kc KubernetesClient
sClients, err := kc.K8SClients(clientConfig)
if err != nil {
klog.Error(err)
return nil, err
}
return sClients, nil
}
func GetKubeEyeConfig(ctx context.Context, client *KubernetesClient) (conf.KubeEyeConfig, error) {
var kc conf.KubeEyeConfig
kubeeyeCm, err := client.ClientSet.CoreV1().ConfigMaps(constant.DefaultNamespace).Get(ctx, "kubeeye-config", metav1.GetOptions{})
if err != nil {
klog.Errorf("failed to get kubeeye config, kubeeye config file do not exist. err:%s", err)
return kc, err
}
config := kubeeyeCm.Data["config"]
err = yaml.Unmarshal([]byte(config), &kc)
if err != nil {
klog.Errorf("failed to unmarshal kubeeye config. err:%s ", err)
return kc, err
}
return kc, nil
}